Definition: In this task, you are given an input list A. You need to extract and sort the unique digits used in the list in ascending order. Return -1 if there is no digit in the list.
Input: ['m', '429', '83', '85', '423', 'e', '497', 'y', 'r', 'p', 'o', 's']

2, 3, 4, 5, 7, 8, 9